FAQ1. Does "xyz" patch work on "xxx" ROM?
Every patch specifically states the supported ROM version (calibration id)

2. Where are my download links?
If you ordered digital goods you should have received an email containing download instructions. These can also be accesed from your account control panel where you can have complete control over your account

3. Where can i find step by step instructions for applying the patches?
General instructions can be found here
Specific patch instructions can be found at each patch product page